IF EXISTS (SELECT *
           FROM INFORMATION_SCHEMA.ROUTINES
           WHERE ROUTINE_NAME='pOutProdDetail_Add'
           AND ROUTINE_SCHEMA='dbo'
           AND ROUTINE_TYPE='PROCEDURE'
          )
          DROP PROCEDURE dbo.pOutProdDetail_Add
GO

CREATE PROC dbo.pOutProdDetail_Add
	@productId		INT,
	@amount			INT,
	@createdBy		INT,
	@outPaperId		INT,
	@date			DATETIME = NULL,
	@vintToShopId	INT = NULL
AS
/*@@*_____________________________________________________________________

  

_____________________________________________________________________*@@*/

/*______________________ CONSTANT DECLARATIONS _________________________*/


/*______________________ VARIABLE DECLARATIONS _________________________*/

  DECLARE
    @intErrNo       INT,
    @strErrMsg      NVARCHAR(400),
    @intReturn      INT,
    @remainAmount	INT,
	@id				INT

/*_______________________________ INIT _________________________________*/

  -- Setting NOCOUNT ON prevents additional recordsets with the
  -- "number of records affected" from being returned, which is not
  -- handled the same by all providers, such as for OLEDB vs. ODBC.
  SET NOCOUNT ON

/*________________________ VALIDATE PARAMETERS _________________________*/


/*_______________________________ MAIN _________________________________*/
	
	SELECT @remainAmount = Product.Amount 
	FROM Product 
	WHERE Id = @productId
	
	--IF(@amount <= @remainAmount) BEGIN
		BEGIN TRANSACTION 
		BEGIN TRY
		-- Insert OutProdPaper if it doesn't exist
		IF NOT EXISTS (SELECT '' FROM OutProdPaper WHERE Id = @outPaperId)
		BEGIN
			SET @date = ISNULL(@date, GETDATE())
			
			INSERT INTO OutProdPaper (Date, CreatedBy, ToShopId)
			VALUES (@date, @createdBy, @vintToShopId)
			SET	@outPaperId = SCOPE_IDENTITY()
		END
		
		-- Insert OutProdDetail
		INSERT INTO OutProdDetail (ProductId, Amount, OutProdPaperId)
		VALUES (@productId, @amount, @outPaperId)
		SET @id = SCOPE_IDENTITY()
		
		UPDATE Product
		SET Amount = (Amount - @amount)
		WHERE Id = @productId
		
		SET @intReturn = 0	
		COMMIT TRANSACTION

		END TRY
		BEGIN CATCH
			SET @intReturn = -2
			ROLLBACK TRANSACTION
		END CATCH

--	END
--	ELSE
--	BEGIN
--		SET @intReturn = -1				
--	END
	
	SELECT Id = @id,
		OutProdPaperId = @outPaperId,
		ReturnValue = @intReturn
		
lblExit:
	RETURN @intReturn 
/*___________________________ ERROR HANDLER ____________________________*/
lblError:
  -- An error has occurred.  On entering this section @intErrNo should
  -- already hold the error number

  -- By default, if there are any open transactions then roll them back
  IF (@@TRANCOUNT > 0) BEGIN
    ROLLBACK TRAN

  END

  -- If return value has not been explicitly set, then use the error
  -- number as return value to signify failure
  IF ((@intReturn IS NULL) OR (@intReturn = 0)) BEGIN
    SET @intReturn = @intErrNo

  END

 GOTO lblExit


